The setting for the gift shop at the Crystal Bridges Museum of American Art seems idyllic—a vast glass wall opens onto a entry courtyard that gives way to a placid pond reflecting the Ozarks landscape. But to create a design for the 3,100 square-foot space in Bentonville, Arkansas, architect Marlon Blackwell had to overcome multiple hurdles. The first: a thicket of concrete columns supporting the green roof of the Moshe Safdie-designed building. Next: the west-facing glass wall, which made heat gain an issue. And finally: the very small budget (the total project cost was $644,000).